A 30ft Double Wing Expandable House is a prefabricated modular unit that folds or closes for transport and opens at the installation site to create a wider usable interior. In practical terms, “30ft” usually refers to the approximate length of the main structure, equal to about 9.14 meters, but the final external and internal dimensions must be confirmed on the supplier’s technical drawing. I help B2B buyers evaluate the layout, materials, logistics, installation requirements, customization scope, and supplier capability before placing an order.
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This guide is intended for importers, contractors, developers, temporary accommodation providers, project owners, and distributors. It explains which specifications should be requested, how to compare quotations, and where hidden costs or project risks may occur. At Hongshun Guangju, we use the buyer’s site conditions, application, local regulations, and shipping plan as the starting point for product selection.
This guide is suitable for buyers who need more space than a conventional single-container room can provide while still requiring efficient transportation and relatively fast deployment. Typical applications may include worker accommodation, site offices, temporary classrooms, security rooms, emergency housing, camp facilities, and commercial support buildings. The right choice depends on the required occupancy, climate, utility connections, local approval process, and expected service period.
It is especially useful when a buyer is comparing multiple factories or receiving quotations with different descriptions of “30ft expandable house.” A product name alone does not establish the actual floor area, structural configuration, insulation level, or included equipment. I recommend treating the name as a starting point and using drawings, bills of materials, packing details, and commercial terms for the final comparison.
A double wing expandable house normally has a central structural section with two side sections that extend outward during installation. The folded unit is designed for transport, while the opened configuration provides a broader room arrangement than the closed shipping form. Depending on the design, the completed unit may include rooms, doors, windows, electrical components, sanitary fittings, flooring, wall panels, and roof elements.
However, the exact configuration is not universal across suppliers. Some manufacturers provide a basic shell, while others offer a more complete package with interior finishing and utility accessories. Buyers should request a line-by-line scope of supply rather than assuming that lighting, plumbing, kitchen units, air conditioning, furniture, or external steps are included.
The first specification to confirm is the opened and folded dimension. A “30ft” model may have a nominal length of approximately 9.14 m, but its width, height, roof projection, and usable floor area can differ by design. Request a dimensioned plan, elevation drawings, folded transport dimensions, gross weight, package count, and lifting points before arranging freight.
| Specification Area | Information to Request | Why It Matters |
|---|---|---|
| Size | Opened length, width, height, and usable floor area | Confirms site fit, occupancy, and layout feasibility |
| Transport | Folded dimensions, gross weight, lifting method, and loading plan | Supports container, truck, crane, and port planning |
| Envelope | Wall, roof, and floor construction with panel thickness in mm | Helps assess insulation, durability, and code requirements |
| Utilities | Electrical rating, plumbing layout, drainage, and ventilation | Reduces installation changes and site delays |
| Installation | Required foundation, tools, crew size, and installation sequence | Allows accurate labor and site-preparation planning |
Electrical requirements should be written clearly in the quotation. For example, a buyer may need a 220–240 V, 50 Hz configuration, while another market may use a different standard; this should never be assumed from the product name. Lighting should also be described by quantity and wattage, such as 12 W LED fittings where applicable, rather than only using the general term “lights.”
For a site office, the priority may be an open working area, cable routing, daylight, ventilation, and durable flooring. For accommodation, the buyer may need bedrooms, bathrooms, a kitchen area, privacy partitions, hot-water provisions, and improved thermal performance. For classrooms or clinics, circulation, accessibility, natural light, hygiene finishes, and local public-building requirements may be more important than the lowest purchase price.
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Climate is another major selection factor. In hot regions, buyers should examine roof insulation, solar heat control, cross-ventilation, and air-conditioning provisions, while cold regions may require a stronger insulated envelope and protected plumbing. In coastal or humid environments, ask about corrosion-resistant finishes, drainage, sealing, and maintenance procedures instead of relying on broad claims such as “weatherproof.”
Prepare a short document stating the destination country, application, target quantity, required layout, occupancy, preferred materials, utility standards, delivery location, and expected installation date. Include site photographs or a basic plan if available. A clear brief allows suppliers to quote the same scope and makes differences between offers easier to identify.
Request a floor plan, elevations, material specification, packing list, and list of included accessories from every shortlisted supplier. Compare the usable floor area, panel construction, doors and windows, electrical package, sanitary equipment, and foundation assumptions. A lower initial price may reflect exclusions that appear later as local procurement, modification, or installation costs.
Ask how the folded unit will be loaded, unloaded, lifted, opened, leveled, connected, and sealed. Confirm whether the buyer or supplier provides the crane, foundation, labor, utility connections, and commissioning. The supplier should also identify the recommended lifting points and any restrictions on transport or site access.
Price, MOQ, and lead time depend on the selected configuration, order quantity, customization, raw-material availability, production schedule, and destination requirements. Therefore, I recommend requesting a formal quotation that separates the unit price, optional items, packaging, inland transport, export handling, freight assumptions, and installation support. Ask the supplier to state the quotation validity period and the conditions that could change the lead time.
As a manufacturer and exporter of 30ft Double Wing Expandable Houses, Hongshun Guangju can support the specification process from the initial application brief through quotation and production coordination. We can discuss room layouts, finishes, electrical requirements, sanitary configurations, packaging, and destination-specific practical considerations. The final scope should always be confirmed through approved drawings and a written commercial document.
For repeat projects, we can help buyers establish a standardized configuration so that future orders are easier to compare and manage. For customized projects, the key is to identify which changes affect structure, transport dimensions, utility routing, production time, or cost before manufacturing begins. We also encourage buyers to confirm inspection arrangements, spare-parts needs, installation instructions, and after-sales communication in advance.
The right 30ft Double Wing Expandable House is not simply the lowest-priced unit with the correct product name. It is the configuration that provides the required space, materials, utility arrangement, transport plan, installation method, and documentation for your specific project. By comparing approved drawings and complete scopes, a B2B buyer can reduce uncertainty before production and avoid preventable site costs.
Your next step should be to prepare the application, destination, quantity, layout, utility standards, and delivery target, then send these details to Hongshun Guangju for technical evaluation. We can use that information to prepare a project-specific quotation and clarify available customization, packaging, installation support, MOQ, and lead-time assumptions. Contact our sales team with your requirements to begin a practical supplier discussion.
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